Heat regenerator



Department of Patented Aug. 14, 1923.

UNITED STATES PATENT OFFICE.

HEAT BEGENEBATOB.

No Drawing. Application filed June 1,

To all whom it our/y concern:

Be it'known that I, HENRI Jan: FRAN- gors PIIILIPON, a citizen of theFrench Republic, residin at Bellegarde-en-Forez, oire, France, haveinvented new and useful Improvements in Heat Regenerators, of which thefollowing is a specification.

This invention relates to improvements in heat recuperative apparatus orregenerators. Large economies of fuel have already been effected infurnaces by applying methods of recuperation. As is well known,recuperation consists in waste or burnt gases to circulate around pi esor the like which bring in the opposite direction the fuel or air forcombustion. In these conditions, the gases give up a part of its heatwhich is thus returned to the furnace. Until the present time there havebeen employed for rccuperative purpose, either metallic tubes or tubesof refractory aluminous material.

In metal pipings, the exchange of heat easily takes place but thesepipes oxidize ormelt so that their use is greatly limited. Thisexplains, for instance, the replacing of recuperators with cast metal oriron tubes (Whitwell type) by regenerators (of the Cowper type).

Present day recuperators are enerally made of stone or pottery ware or auminous earth. Such pottery ware possesses serious inconveniencesbecause it is generally too thick (5 mm. thickness at least); exchange1921. Serial No. 474,250.

According to the present invention tubes of fused quartz are employed inthe construction of heat recuperative apparatus; in this wayrecuperators can be constructed having a very high efficiency becausetubes can be obtained of fused quartz having very thin walls (2millimetres for instance) which are easil permeated or passed through byheat. oreover, since fused quartz is very refractory, it can be employedin furnaces giving the highest known temperatures; by reason of its lowexpansion it does not present the inconveniences of tubes of iron orcast metal and can be subjected, without danger, to abrupt variations oftemperature. Lastly fused quartz being unalterable at high temperature,apparatus provided with these quartz tubes require hardly anymaintenance or upkeep.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

l. A heat recuperative apparatus for fur-, naces and the like comprisingfused quartz tubular elements, through which takes place the exchange ofheat.

2. A heat recuperative apparatus for fur- V naces and the likecomprising fused quartz, tubular elements with very thin walls, saidwalls permitting free heat exchange to take place therethrough.

In testimony whereof I have signed my name to this specification.

of heat thus takes place badly through the walls. Moreover it is notserviceable in furnaces where the gases pass out at a high temperaturebecause of the low fusing point of such pottery ware and also becauserefrac tor aluminous materials lose their Shape at igh temperature.

HENRI .IQAN FRANQOIS PHILIPON. [L. 8.]

Witnesses ETIENNE Dnsoaonons, SAIDMON Avmnoa.

